"\ \" meaning in All languages combined

{
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "10": "",
        "11": "or",
        "12": "",
        "2": "punctuation mark",
        "3": "",
        "4": "",
        "5": "",
        "6": "",
        "7": "or",
        "8": "",
        "9": "or",
        "cat2": "matched pairs",
        "f1lang": "en",
        "f1nolink": "",
        "f2lang": "en",
        "f2nolink": "",
        "f3lang": "en",
        "f3nolink": "",
        "f4lang": "en",
        "f4nolink": "",
        "head": "",
        "head2": "",
        "sc": "",
        "sort": ""
      },
      "expansion": "\\ \\",
      "name": "head"
    },
    {
      "args": {
        "cat2": "matched pairs"
      },
      "expansion": "\\ \\",
      "name": "mul-punctuation mark"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "punct",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Translingual entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "name": "Translingual matched pairs",
          "parents": [
            "Matched pairs",
            "Symbols",
            "Letters, symbols, and punctuation",
            "Orthography",
            "Writing",
            "Human behaviour",
            "Language",
            "Human",
            "Communication",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "name": "Translingual punctuation marks",
          "parents": [
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            "Letters, symbols, and punctuation",
            "Symbols",
            "Orthography",
            "Writing",
            "Human behaviour",
            "Language",
            "Human",
            "Communication",
            "All topics",
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          "kind": "topical",
          "langcode": "mul",
          "name": "Linguistics",
          "orig": "mul:Linguistics",
          "parents": [
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            "Social sciences",
            "Communication",
            "Sciences",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "The words \\ˈmeɪri\\ (Mary), \\ˈmɛri\\ (merry) and \\ˈmæri\\ (marry) are all pronounced /ˈmɛri/ in General American, whereas \\ˈspɑː\\ (spa) and \\ˈspɑːr\\ (spar) are both pronounced /ˈspɑː/ in Received Pronunciation."
        }
      ],
      "glosses": [
        "Encloses diaphonemic transcription."
      ],
      "id": "en-\\_\\-mul-punct-1hFKPhMo",
      "links": [
        [
          "linguistics",
          "linguistics"
        ],
        [
          "diaphonemic",
          "diaphonemic#English"
        ],
        [
          "transcription",
          "transcription#English"
        ]
      ],
      "raw_glosses": [
        "(linguistics) Encloses diaphonemic transcription."
      ],
      "raw_tags": [
        "punctuation"
      ],
      "synonyms": [
        {
          "word": "⫽ ⫽"
        },
        {
          "word": "| |"
        },
        {
          "word": "! !"
        }
      ],
      "topics": [
        "human-sciences",
        "linguistics",
        "sciences"
      ]
    }
  ],
  "word": "\\ \\"
}

{
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "10": "",
        "11": "or",
        "12": "",
        "2": "punctuation mark",
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        "4": "",
        "5": "",
        "6": "",
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        "8": "",
        "9": "or",
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        "f3lang": "en",
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        "f4lang": "en",
        "f4nolink": "",
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        "head2": "",
        "sc": "",
        "sort": ""
      },
      "expansion": "\\ \\",
      "name": "head"
    },
    {
      "args": {
        "cat2": "matched pairs"
      },
      "expansion": "\\ \\",
      "name": "mul-punctuation mark"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "punct",
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Translingual entries with incorrect language header",
        "Translingual lemmas",
        "Translingual matched pairs",
        "Translingual punctuation marks",
        "Translingual terms spelled with \\",
        "mul:Linguistics"
      ],
      "examples": [
        {
          "text": "The words \\ˈmeɪri\\ (Mary), \\ˈmɛri\\ (merry) and \\ˈmæri\\ (marry) are all pronounced /ˈmɛri/ in General American, whereas \\ˈspɑː\\ (spa) and \\ˈspɑːr\\ (spar) are both pronounced /ˈspɑː/ in Received Pronunciation."
        }
      ],
      "glosses": [
        "Encloses diaphonemic transcription."
      ],
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          "linguistics"
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      ],
      "raw_glosses": [
        "(linguistics) Encloses diaphonemic transcription."
      ],
      "raw_tags": [
        "punctuation"
      ],
      "synonyms": [
        {
          "word": "⫽ ⫽"
        },
        {
          "word": "| |"
        },
        {
          "word": "! !"
        }
      ],
      "topics": [
        "human-sciences",
        "linguistics",
        "sciences"
      ]
    }
  ],
  "word": "\\ \\"
}